Slip box with liner



Nov. 29, 1966 R. w. ERLBACHER SLIP BOX WITH LINER Filed April 25, 1964 INVENTOR: ROBERT W. ERLBAcHEQ, BY /V7A&4111I HTToRA/E Y5 United States Patent 3,287,771 SLIP BOX WITH LINER Robert W. Erlbacher, 920 N. Fountain, Cape Girardeau, Mo. Filed Apr. 23, 1964, Ser. No. 362,133 2 Claims. (Cl. 22112) This invention relates to improvements in foundry slip boxes and in particular is concerned with improvements in reinforcing the side walls of the slip box and providing for protection of insulating liners in the box.

Slip boxes for use in foundary applications have long been made with insulating liners of a rigid sheet-like construction of asbestos cement as an insulating material. Such slip box liners have been subject to breakage of the edges of the liner, since this material is somewhat frangible and difficulty has been experienced in this regard in the past.

By means of the present invention, the slip box is constructed with a grooved or arcuate longitudinal reinforcing rib at the top and the bottom, which receives in positioning fashion the edges of the liner and protects them. The rib serves both as a positioning and protecting member and also as a reinforcing means for the side walls of the liner to prevent distortion. A greatly improved slip box has been afforded, which is strong and provides for protection of the liner material against damage. By means of integral construction of the side walls, simplicity in design, and low cost is provided as advantageous features.

The above features are objects of this invention and further objects will appear in the detailed description which follows and will be otherwise apparent to those skilled in the art.

For the purpose of illustration of this invention, a preferred embodiment thereof is shown in the accompanying drawings. It is to be understood that these drawings are for the purpose of example only and that the invention is not limited thereto.

In the drawings:

FIGURE 1 is a top plan view of the slip box;

FIGURE 2 is a view in front elevation for the slip box;

FIGURE 3 is a view in side elevation of the slip box taken from the right side of FIGURE 1;

FIGURE 4 is an enlarged view in section taken on the line 44 of FIGURE 1; and

FIGURE 5 is an enlarged fragmentary view of the inside of an end wall showing the positioning of the liner between the top and bottom reinforcing and positioning ribs.

Referring now to the drawings, the slip box is generally indicated by the reference numeral 10, and, as shown in FIGURES 1 and 2, is comprised of four side walls 12, 14, 16 and 18. Each of these side walls is provided with a top reinforcing and liner positioning rib generally indicated by the reference numeral 20, and a smiliar bottom rib generally indicated by the reference numeral 22. A11 insulating liner of asbestos-cement, such as that commonly sold under the trademark Transite by Johns- Mansville Corporation, is attached to each of the side walls and is indicated by the reference numeral 24.

Each of the side walls isprovided with appropriate securing means for connecting the overlapping ends of the side walls. This securing means may take the form of a positioning lug 26 of half oval configuration which mates with a specially configured oval opening 28 in an adjacent end of the mating side wall, as best shown in FIGURES 1, 2, 3 and 5. A cotter pin 29 serves as a lock. This construction for the securing means is particularly shown in my United States Patent No. 2,847,740, granted August 19, 1958, but it will be understood that 3,287,777 Patented Nov. 29, 1966 other securing means for the corners of the slip box may be employed.

The reinforcing rib construction is best shown in FIG- URES 4 and 5. The construction of the top and bottom ribs 20 and 22 is similar. Thus, each rib extends longitudinally along the top or bottom edge of the side wall and is formed integrally with the side Wall. The rib has a grooved cross-section 30 as indicated in FIGURE 4, which is shown as arcuate for best construction, but it will be understood that it may be channel shaped. A lip element extends from the rib inwardly of the side wall so as to serve as a protective and positioning member for the Transite liner 24, which may abutt or be closely spaced from it. This is best illustrated for the lip element by the reference numeral 32 in FIGURE 4. The top and bottom lip elements for the top and bottom reinforcing members run parallel and the liner fits within the limiting position defined by the lip elements in snug position and is protected thereby.

The liner member itself is simply connected through openings 33 and 34 in the liner and the side wall respectively by means of acounter sunk bolt 35 and nut 36, whereby the insulating member can be firmly attached to the side wall. Through the use of the positioning element 32 of the reinforcing rib, only two bolts are required to effect a firm positioning. This facilitates any easy change should different liners be desired.

1 Use The insulating liner member 24 is very simply secured to the side walls of the slip box. The bolts 34 are put through the appropriate openings in the liner and the side wall and then the liner is brought up tight against the side wall by tightening the nuts. The top and bottom lip elements of the reinforcing rib members serve as positioning and stop members, and further serve to protect the edges of the liner against damage. Where replacement is desired, the liner can be very simply removed and replaced by another liner. Thus, different thickness liners can be very simply substituted for existing liners, or should any other replacement be desired, this can be very simply effected.

The slip box is employed in the usual fashion upon a mold by placing the bottom of the box over the top of the mold and then carefully lowering it downwardly over the mold. As this operation is carried out, the individual side walls of the box can be slightly rotated one with respect to another about the positioning lugs to enlarge the bottom opening so as to properly receive the mold. Thus, slight irregularities in the mold can be tolerated without breaking off corners of the mold or crushing it.

Thus, there has been provided a slip box which has very substantial strength in the side wall members through the special construction and configuration of the reinforcing top and bottom rib. The special configuration of the rib and the extension of the lip element further serves very effectively to protect the edges of the insulating liner and also to serve as a positioning member. Through this integral construction of the side wall through a single piece of suitable material, such as the usual metallic construction or the like, simple fabrication can be effected while still retaining the very substantial advantages of strong construction and resistance to deformation and protection of the liner element.

Various changes may be made in the above invention as will be readily apparent to those skilled in the art. Such changes and modifications are within the scope and teaching of the invention as defined by the claims appended hereto.

What is claimed is:

1. A slip box having a plurality of separate sides forming a closure, said sides mating with one another in substantially endwise relationto form a plurality of corners, each of said sides having a grooved outwardly projecting reinforcing rib member extending along the top and bottom of the side serving as a reinforcing means, and each of said sides having a flat inside surface between the top and bottom ribs, a fiat sheet-like insulating member removably attached to the interior of said sides and a protective member for top and bottom edges of said insulating member comprising a lip element extending inwardly from each of said ribs past the edge of the insulat- 1O ing member, each of said sides and ribs and lip elements being formed of an integral piece of material.

2. A slip box having a plurality of separate sides form ing a closure, said sides mating with one another in substantially endwise relation to form a plurality of corners, each of said sides having a grooved outwardly projecting reinforcing rib member extending along the top and bottom of the side serving as a reinforcing means, and each of said sides having a substantially flat inside surface, a flat sheet-like insulating member removably attached to the interior of said sides and a protective member for top and bottom edges of said insulating member comprising a lip element extending inwardly from each of said ribs past the edge of the insulating member, each of said sides and ribs and lip elements being formed of an integral piece of material.

References Cited by the Examiner UNITED STATES PATENTS J. SPENCER OVERHOLSER, Primary Examiner.

MARCUS U. LYONS, E. MAR, Assistant Examiners. 

1. A SLIP BOX HAVING A PLURALITY OF SEPARATE SIDES FORMING A CLOSURE, SAID SIDES MATING WITH ONE ANOTHER IN SUBSTANTIALLY ENDWISE RELATION TO FORM A PLURALITY OF CORNERS, EACH OF SAID SIDES HAVING A GROOVED OUTWARDLY PROJECTING REINFORCING RIB MEMBER EXTENDING ALONG THE TOP AND BOTTOM OF THE SIDE SERVING AS A REINFORCING MEANS, AND EACH OF SAID SIDES HAVING A FLAT INSIDE SURFACE BETWEEN THE TOP AND BOTTOM RIBS, A FLAT SHEET-LIKE INSULATING MEMBER REMOVABLY ATTACHED TO THE INTERIOR OF SAID SIDES AND A PROTECTIVE MEMBER FOR TOP AND BOTTOM EDGES OF SAID INSULATING MEMBER COMPRISING A LIP ELEMENT EXTENDING INWARDLY FROM EACH OF SAID RIBS PAST THE EDGE OF THE INSULATING MEMBER, EACH OF SAID SIDES AND RIBS AND LIP ELEMENTS BEING FORMED OF AN INTEGRAL PIECE OF MATERIAL. 